How often should children be screened for lead poisoning?

Screening children for lead poisoning is crucial, especially in early childhood, as this is a critical period for brain development. The correct answer emphasizes that screening should occur at specific ages—1 and 2 years—when children are most vulnerable, and additionally if they are at elevated risk due to factors such as living in older housing, exposure from a caregiver, or other socioeconomic factors.

Screening at these ages allows for early detection and intervention, which can significantly reduce the potential for adverse health effects caused by lead exposure. It acknowledges that not all children need to be tested annually; however, those deemed at risk should receive testing to ensure timely intervention.

Other options suggest different screening intervals that may either overlook the developmental risks during critical ages or only consider testing when obvious signs are present, which may delay diagnosis and treatment. The recommended ages for screening provide a practical approach to managing public health concerns surrounding lead exposure in children.